Anker 737 Power Bank (PowerCore 24K) 24,000mAh

The Anker 737 PowerCore 24K is a high-capacity power bank designed for the laptop-charging era — where 140W bi-directional output via Power Delivery 3.1 enables charging a MacBook Pro, Dell XPS, or similar USB-C laptop alongside a phone simultaneously from a single 24,000mAh cell. The 140W output is the defining specification. At this power level, the 737 can deliver USB-C laptop charging at near-wall-speed — faster than many included laptop chargers. The bi-directional design means the 737 both charges devices at 140W and recharges itself at 140W when connected to a 140W adapter, minimising the time needed to top up the bank between uses. The digital display is unusually informative for a power bank: it shows input and output wattage in real time, the estimated time to full charge, and remaining battery percentage. Knowing that your laptop is drawing 65W and the bank has 3 hours of capacity at that rate is qualitatively more useful than a four-dot LED indicator. Three ports (2× USB-C, 1× USB-A) allow charging three devices simultaneously. At 24,000mAh, capacity covers approximately three full phone charges, a laptop from 20% to full, or sustained 65W laptop operation for around 4–5 hours depending on device draw. With nearly 17,000 Amazon reviews at 4.4 stars, the Anker 737 is among the most validated high-capacity power banks on the UK market.